Excerpts from Books and Wikipedia
"The Umayyad conquest of Hispania, also known as the Muslim conquest of the Iberian Peninsula or the Umayyad conquest of the Visigothic Kingdom, was the initial expansion of the Umayyad Caliphate over Hispania (in the Iberian Peninsula) from 711 to 718. The conquest resulted in the destruction of the Visigothic Kingdom and the establishment of the Umayyad Wilayah of Al-Andalus. The conquest marks the westernmost expansion of both the Umayyad Caliphate and Muslim rule into Europe.
During the caliphate of the Umayyad Caliph Al-Walid I, forces led by Tariq ibn Ziyad disembarked in early 711 in Gibraltar at the head of an army consisting of Berbers from north Africa. After defeating the Visigothic king Roderic at the decisive Battle of Guadalete, Tariq was reinforced by an Arab force led by his superior wali Musa ibn Nusayr and continued northward. By 717, the combined Arab-Berber force had crossed the Pyrenees into Septimania. They occupied further territory in Gaul until 759." [Wikipedia]